The cost of installing a gas water heater is the unit, plus labor, plus anything the old setup lacks. Venting, a gas shutoff, a drain pan and a safe discharge pipe all count. A simple swap in the same spot is the cheapest case.
No two basements are alike, so we will not print a single price. This post lists what changes the total and what to ask before you say yes.
If you smell gas, stop here
Do not flip switches or use a phone indoors.
Call the gas utility or 911 first. Call a plumber only after the area is cleared.
A pilot that keeps going out or a burner that smells deserves a professional check.
Where the money goes
Insurance rarely pays for a planned replacement. If an old tank burst and soaked a finished basement, a claim may cover water damage but not the tank. Photograph the failed unit and the area before cleanup.
Same spot, new spot or a different style
| Option | What it involves | Cost driver |
|---|---|---|
| Same size, same place | Drain, disconnect, set, vent, relight and test. | Condition of the old gas line and vent. |
| Move the heater | New gas, water and vent runs. | Distance and opening walls. |
| Power vent | Fan assisted venting through a side wall. | Electric outlet and a plastic vent route. |
| Switch to tankless | Larger gas line, new vent, wall mount. | Gas line sizing and venting changes. |
Standard atmospheric units vent by natural draft up a flue and cost the least. Power vent units use a fan to push exhaust out a side wall through plastic pipe, which helps when a chimney is missing or oversized. Condensing models squeeze out more heat and need a drain for the acidic condensate. Each step up in efficiency usually raises the purchase price and the installation work.
Leak from the tank body
Water at the base from a seam means the tank has failed and cannot be repaired.
Rust colored hot water
The anode rod is gone and the tank is rusting from inside.
Loud rumbling
Sediment on the bottom is overheating and wasting gas.
Unit near or past its normal life
Many tanks last roughly 8 to 12 years, so an older unit with repairs piling up is a replacement candidate.
If you are weighing a swap, our water heater replacement page explains when to replace a unit rather than repair it. If you want a new location or fuel, our water heater installation team handles the layout, gas and venting.
Ready to price your new heater?
Call, tell us the tank size and the vent type, and we will say what the job involves.
Willingboro, NJ: cold inlet water, hard questions and permits
Willingboro has a humid subtropical climate with a January average of 32.8F and hardiness zone 7a. In deep winter the water entering your heater is cold, so the unit works harder and recovers more slowly. If your household takes back to back showers, size up or look at a faster recovery model.
The Willingboro Municipal Utilities Authority posts an annual Report to Consumers on Water Quality at wmua.info, and its site invites you to test your tap. We do not state a hardness number for the township, because the site we reviewed does not. Read the report and test your tap, since mineral content affects sediment and how long a tank lasts.
Permit rules vary, so ask the Willingboro building department. The Construction Official, Inspections and Code Enforcement office at 609-877-2200 reviews permit applications and enforces the New Jersey Uniform Construction Code. Ask what it needs for a gas appliance before the heater arrives.
Questions worth asking each installer
- Does the quote include venting, gas connection, pan and discharge pipe?
- What brand and warranty length is the tank, and who files claims?
- Who handles the permit if one is needed?
- What happens if the old vent fails inspection?
- Is the old tank hauled away?
A cheap quote that leaves out venting can end up costing more. Ask for the scope in writing, and make sure the tank size, the model and every code item appear on it.
Sizing a heater for how you live
The first hour rating on the yellow label tells you how much hot water the unit delivers in a busy hour. Add up the showers, the dishwasher and the laundry that might run back to back, then compare that to the rating. A family of four often needs a different heater than a couple, and a household with a soaking tub needs more still.
Recovery speed matters as much as tank size. A 50 gallon tank with a strong burner can outperform a 60 gallon tank with a weak one. Ask the installer for the first hour rating, not just the capacity, and for the gas input in BTU per hour.
Finally, think about the next 10 years. If you plan a bathroom addition, a larger family or a switch to a different fuel, say so now. It is cheaper to run a bigger gas line once than to open walls twice.
Sizing matters too. A heater that is too small runs out of hot water, and one that is too large wastes gas keeping extra water warm all day.
Questions from Willingboro homeowners
How long does a gas water heater installation take?
A same-spot swap often takes a few hours. New venting or a gas line change adds time.
Is a gas water heater cheaper to run than electric?
It often is, depending on local gas and electric rates. The comparison changes year to year, so check current bills.
Should I replace the venting when I replace the heater?
Often yes if it is corroded, undersized or poorly pitched. We inspect it before we close up.
What size gas water heater do I need?
It depends on household size and usage. A typical family often starts at 40 to 50 gallons, and we size to your pattern.
Should I read the WMUA water quality report before choosing a heater?
It is a good idea. The report is posted at wmua.info, and it helps you decide on sediment protection, a water test and tank care.
We install gas water heaters for homes in Burlington Township and Edgewater Park too. Have your current tank size and the location of the gas shutoff ready when you call.